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36 * - do we need to do *all* of this at boot?
42 #include <boot/arm-missing-opcodes.h>
45 ; LVT Ring Osc counter
46 ; used to determine sense amp settings
47 ; Clobbers registers r0, r4, r5, r6, r7, r9, r10, r11
49 .equ CLK_CTL_BASE, 0xA8600000
50 .equ A_GLBL_CLK_ENA, 0x0000
51 .equ A_PRPH_WEB_NS_REG,0x0080
52 .equ A_MSM_CLK_RINGOSC,0x00D0
53 .equ A_TCXO_CNT, 0x00D4
54 .equ A_TCXO_CNT_DONE, 0x00D8
55 .equ A_RINGOSC_CNT, 0x00DC
56 .equ A_MISC_CLK_CTL, 0x0108
57 .equ CLK_TEST, 0xA8600114
58 .equ SPSS_CSR_BASE, 0xAC100000
59 .equ A_SCRINGOSC, 0x0510
61 //;; Number of TCXO cycles to count ring oscillations
62 .equ TCXO_CNT_VAL, 0x100
65 .equ TCSR_CONF_FUSE_1, 0xAB600060 //; TCSR_CONF_FUSE_1 register
66 .equ TCSR_CONF_FUSE_4, 0xAB60006C //; TCSR_CONF_FUSE_4 register
68 //; SCORPION_L1_ACC (1:0) Fuses bit location
69 .equ L1_ACC_BIT_0, 12 //;12th bit of TCSR_CONF_FUSE_4
70 .equ L1_ACC_BIT_1, 13 //;13th bit of TCSR_CONF_FUSE_4
71 //; SCORPION_L2_ACC (2:0) Fuses bit location
72 .equ L2_ACC_BIT_0, 25 //;25th bit of TCSR_CONF_FUSE_1
73 .equ L2_ACC_BIT_1, 10 //;10th bit of TCSR_CONF_FUSE_4
74 .equ L2_ACC_BIT_2, 11 //;11th bit of TCSR_CONF_FUSE_4
76 //; CP15: PVR2F0 values according to SCORPION_L1_ACC (1:0)
77 .equ PVR2F0_00, 0x00000000
78 .equ PVR2F0_01, 0x04000000
79 .equ PVR2F0_10, 0x08000000
80 .equ PVR2F0_11, 0x0C000000
82 //; CP15: PVR2F1 values according to SCORPION_L1_ACC (1:0)
83 .equ PVR2F1_00, 0x00000008
84 .equ PVR2F1_01, 0x00000008
85 .equ PVR2F1_10, 0x00000208
86 .equ PVR2F1_11, 0x00000208
88 //; CP15: PVR0F2 values according to SCORPION_L1_ACC (1:0)
89 .equ PVR0F2_00, 0x00000000
90 .equ PVR0F2_01, 0x00000000
91 .equ PVR0F2_10, 0x00000200
92 .equ PVR0F2_11, 0x00000200
94 //; CP15: PVR0F0 values according to SCORPION_L1_ACC (1:0)
95 .equ PVR0F0_00, 0x7F000000
96 .equ PVR0F0_01, 0x7F000400
97 .equ PVR0F0_10, 0x7F000000
98 .equ PVR0F0_11, 0x7F000400
100 //; CP15: L2VR3F1 values according to SCORPION_L2_ACC (2:0)
101 .equ L2VR3F1_000, 0x00FFFF60
102 .equ L2VR3F1_001, 0x00FFFF40
103 .equ L2VR3F1_010, 0x00FFFC60
104 .equ L2VR3F1_011, 0x00FFFC40
105 .equ L2VR3F1_100, 0x00FCFF60
106 .equ L2VR3F1_101, 0x00FCFF40
107 .equ L2VR3F1_110, 0x00FCFC60
108 .equ L2VR3F1_111, 0x00FCFC40
113 //;--------------------------------------------------------------------
114 //; Fuse bits used to determine sense amp settings
115 //;--------------------------------------------------------------------
120 //; Read L1_ACC_BIT_0
121 LDR r1, =TCSR_CONF_FUSE_4
122 LDR r2, =L1_ACC_BIT_0
128 //; Read L1_ACC_BIT_1
129 LDR r1, =TCSR_CONF_FUSE_4
130 LDR r2, =L1_ACC_BIT_1
138 //; if L1_[1:0] == 00
146 B WRITE_L1_SA_SETTINGS
149 //; if L1_[1:0] == 01
157 B WRITE_L1_SA_SETTINGS
160 //; if L1_[2:0] == 10
168 B WRITE_L1_SA_SETTINGS
171 //; if L1_[2:0] == 11
178 B WRITE_L1_SA_SETTINGS
181 WRITE_L1_SA_SETTINGS:
184 MCR p15, 0x0, r0, c15, c15, 0x0 //; write R0 to PVR0F0
187 MCR p15, 0x0, r1, c15, c15, 0x2 //; write R1 to PVR0F2
190 MCR p15, 0x2, r2, c15, c15, 0x0 //; write R2 to PVR2F0
192 // Disable predecode repair cache on certain Scorpion revisions
193 // (Raptor V2 and earlier, or Halcyon V1)
194 MRC p15, 0, r1, c0, c0, 0 //; MIDR
195 BIC r2, r1, #0xf0 //; check for Halcyon V1
201 MRC p15, 0, r1, c15, c15, 2 //; PVR0F2
202 ORR r1, r1, #0x10 //; enable bit 4
203 MCR p15, 0, r1, c15, c15, 2 //; disable predecode repair cache
207 MCR p15, 0x2, r3, c15, c15, 0x1 //; write R3 to PVR2F1
212 //; Read L2_ACC_BIT_0
213 LDR r1, =TCSR_CONF_FUSE_1
214 LDR r2, =L2_ACC_BIT_0
220 //; Read L2_ACC_BIT_1
221 LDR r1, =TCSR_CONF_FUSE_4
222 LDR r2, =L2_ACC_BIT_1
229 //; Read L2_ACC_BIT_2
230 LDR r1, =TCSR_CONF_FUSE_4
231 LDR r2, =L2_ACC_BIT_2
239 //; if L2_[2:0] == 000
244 B WRITE_L2_SA_SETTINGS
247 //; if L2_[2:0] == 001
252 B WRITE_L2_SA_SETTINGS
255 //; if L2_[2:0] == 010
260 B WRITE_L2_SA_SETTINGS
263 //; if L2_[2:0] == 011
268 B WRITE_L2_SA_SETTINGS
271 //; if L2_[2:0] == 100
276 B WRITE_L2_SA_SETTINGS
279 //; if L2_[2:0] == 101
284 B WRITE_L2_SA_SETTINGS
287 //; if L2_[2:0] == 110
292 B WRITE_L2_SA_SETTINGS
295 //; if L2_[2:0] == 111
299 B WRITE_L2_SA_SETTINGS
301 WRITE_L2_SA_SETTINGS:
303 MCR p15, 0x3, r0, c15, c15, 0x1 //;write r0 to L2VR3F1
307 LDR r0, =0 //;make sure the registers we touched
308 LDR r1, =0 //;are cleared when we return
320 .globl __cpu_early_init
322 //; Zero out r0 for use throughout this code. All other GPRs
323 //; (r1-r3) are set throughout this code to help establish
324 //; a consistent startup state for any code that follows.
325 //; Users should add code at the end of this routine to establish
326 //; their own stack address (r13), add translation page tables, enable
331 //; Remove hardcoded cache settings. appsbl_handler.s calls Set_SA
332 //; API to dynamically configure cache for slow/nominal/fast parts
334 //; DCIALL to invalidate L2 cache bank (needs to be run 4 times, once per bank)
335 //; This must be done early in code (prior to enabling the caches)
337 MCR p15, 0, r1, c9, c0, 6 //; DCIALL bank D ([15:14] == 2'b00)
338 ORR r1, r1, #0x00004000
339 MCR p15, 0, r1, c9, c0, 6 //; DCIALL bank C ([15:14] == 2'b01)
340 ADD r1, r1, #0x00004000
341 MCR p15, 0, r1, c9, c0, 6 //; DCIALL bank B ([15:14] == 2'b10)
342 ADD r1, r1, #0x00004000
343 MCR p15, 0, r1, c9, c0, 6 //; DCIALL bank A ([15:14] == 2'b11)
345 //; Initialize the BPCR - setup Global History Mask (GHRM) to all 1's
346 //; and have all address bits (AM) participate.
347 //; Different settings can be used to improve performance
349 .word 0xe30011ff // hardcoded MOVW instruction due to lack of compiler support
351 .word 0xe34011ff // hardcoded MOVT instruction due to lack of compiler support
352 MCR p15, 7, r1, c15, c0, 2 //; WCP15_BPCR
355 //; Initialize all I$ Victim Registers to 0 for startup
356 MCR p15, 0, r0, c9, c1, 0 //; WCP15_ICVIC0 r0
357 MCR p15, 0, r0, c9, c1, 1 //; WCP15_ICVIC1 r0
358 MCR p15, 0, r0, c9, c1, 2 //; WCP15_ICVIC2 r0
359 MCR p15, 0, r0, c9, c1, 3 //; WCP15_ICVIC3 r0
360 MCR p15, 0, r0, c9, c1, 4 //; WCP15_ICVIC4 r0
361 MCR p15, 0, r0, c9, c1, 5 //; WCP15_ICVIC5 r0
362 MCR p15, 0, r0, c9, c1, 6 //; WCP15_ICVIC5 r0
363 MCR p15, 0, r0, c9, c1, 7 //; WCP15_ICVIC7 r0
365 //; Initialize all I$ Locked Victim Registers (Unlocked Floors) to 0
366 MCR p15, 1, r0, c9, c1, 0 //; WCP15_ICFLOOR0 r0
367 MCR p15, 1, r0, c9, c1, 1 //; WCP15_ICFLOOR1 r0
368 MCR p15, 1, r0, c9, c1, 2 //; WCP15_ICFLOOR2 r0
369 MCR p15, 1, r0, c9, c1, 3 //; WCP15_ICFLOOR3 r0
370 MCR p15, 1, r0, c9, c1, 4 //; WCP15_ICFLOOR4 r0
371 MCR p15, 1, r0, c9, c1, 5 //; WCP15_ICFLOOR5 r0
372 MCR p15, 1, r0, c9, c1, 6 //; WCP15_ICFLOOR6 r0
373 MCR p15, 1, r0, c9, c1, 7 //; WCP15_ICFLOOR7 r0
375 //; Initialize all D$ Victim Registers to 0
376 MCR p15, 2, r0, c9, c1, 0 //; WP15_DCVIC0 r0
377 MCR p15, 2, r0, c9, c1, 1 //; WP15_DCVIC1 r0
378 MCR p15, 2, r0, c9, c1, 2 //; WP15_DCVIC2 r0
379 MCR p15, 2, r0, c9, c1, 3 //; WP15_DCVIC3 r0
380 MCR p15, 2, r0, c9, c1, 4 //; WP15_DCVIC4 r0
381 MCR p15, 2, r0, c9, c1, 5 //; WP15_DCVIC5 r0
382 MCR p15, 2, r0, c9, c1, 6 //; WP15_DCVIC6 r0
383 MCR p15, 2, r0, c9, c1, 7 //; WP15_DCVIC7 r0
385 //; Initialize all D$ Locked VDCtim Registers (Unlocked Floors) to 0
386 MCR p15, 3, r0, c9, c1, 0 //; WCP15_DCFLOOR0 r0
387 MCR p15, 3, r0, c9, c1, 1 //; WCP15_DCFLOOR1 r0
388 MCR p15, 3, r0, c9, c1, 2 //; WCP15_DCFLOOR2 r0
389 MCR p15, 3, r0, c9, c1, 3 //; WCP15_DCFLOOR3 r0
390 MCR p15, 3, r0, c9, c1, 4 //; WCP15_DCFLOOR4 r0
391 MCR p15, 3, r0, c9, c1, 5 //; WCP15_DCFLOOR5 r0
392 MCR p15, 3, r0, c9, c1, 6 //; WCP15_DCFLOOR6 r0
393 MCR p15, 3, r0, c9, c1, 7 //; WCP15_DCFLOOR7 r0
395 //; Initialize ASID to zero
396 MCR p15, 0, r0, c13, c0, 1 //; WCP15_CONTEXTIDR r0
398 //; ICIALL to invalidate entire I-Cache
399 MCR p15, 0, r0, c7, c5, 0 //; ICIALLU
401 //; DCIALL to invalidate entire D-Cache
402 MCR p15, 0, r0, c9, c0, 6 //; DCIALL r0
404 //; Initialize ADFSR to zero
405 MCR p15, 0, r0, c5, c1, 0 //; ADFSR r0
407 //; Initialize EFSR to zero
408 MCR p15, 7, r0, c15, c0, 1 //; EFSR r0
410 //; The VBAR (Vector Base Address Register) should be initialized
411 //; early in your code. We are setting it to zero
412 MCR p15, 0, r0, c12, c0, 0 //; WCP15_VBAR r0
414 //; Ensure the MCR's above have completed their operation before continuing
418 //;-------------------------------------------------------------------
419 //; There are a number of registers that must be set prior to enabling
420 //; the MMU. The DCAR is one of these registers. We are setting
421 //; it to zero (no access) to easily detect improper setup in subsequent
423 //;-------------------------------------------------------------------
424 //; Setup DACR (Domain Access Control Register) to zero
425 MCR p15, 0, r0, c3, c0, 0 //; WCP15_DACR r0
427 //; Setup DCLKCR to allow normal D-Cache line fills
428 MCR p15, 1, r0, c9, c0, 7 //; WCP15_DCLKCR r0
430 //; Setup the TLBLKCR
431 //; Victim = 6'b000000; Floor = 6'b000000;
432 //; IASIDCFG = 2'b00 (State-Machine); IALLCFG = 2'b01 (Flash); BNA = 1'b0;
434 MCR p15, 0, r1, c10, c1, 3 //; WCP15_TLBLKCR r1
436 //;Make sure TLBLKCR is complete before continuing
439 //; Invalidate the UTLB
440 MCR p15, 0, r0, c8, c7, 0 //; UTLBIALL
442 //; Make sure UTLB request has been presented to macro before continuing
446 //; setup L2CR1 to some default Instruction and data prefetching values
447 //; Users may want specific settings for various performance enhancements
448 //; In Halcyon we do not have broadcasting barriers. So we need to turn
449 // ; on bit 8 of L2CR1; which DBB:( Disable barrier broadcast )
451 MCR p15, 3, r2, c15, c0, 3 //; WCP15_L2CR1 r0
454 //; Enable Z bit to enable branch prediction (default is off)
455 MRC p15, 0, r2, c1, c0, 0 //; RCP15_SCTLR r2
456 ORR r2, r2, #0x00000800
457 MCR p15, 0, r2, c1, c0, 0 //; WCP15_SCTLR r2
459 //; Make sure Link stack is initialized with branch and links to sequential addresses
460 //; This aids in creating a predictable startup environment
471 //; REMOVE FOLLOWING THREE INSTRUCTIONS WHEN POWER COLLAPSE IS ENA
472 //;Make sure the DBGOSLSR[LOCK] bit is cleared to allow access to the debug registers
473 //; Writing anything but the "secret code" to the DBGOSLAR clears the DBGOSLSR[LOCK] bit
474 MCR p14, 0, r0, c1, c0, 4 //; WCP14_DBGOSLAR r0
477 //; Read the DBGPRSR to clear the DBGPRSR[STICKYPD]
478 //; Any read to DBGPRSR clear the STICKYPD bit
479 //; ISB guarantees the read completes before attempting to
480 //; execute a CP14 instruction.
481 MRC p14, 0, r3, c1, c5, 4 //; RCP14_DBGPRSR r3
484 //; Initialize the Watchpoint Control Registers to zero (optional)
485 //;;; MCR p14, 0, r0, c0, c0, 7 ; WCP14_DBGWCR0 r0
486 //;;; MCR p14, 0, r0, c0, c1, 7 ; WCP14_DBGWCR1 r0
489 //;----------------------------------------------------------------------
490 //; The saved Program Status Registers (SPSRs) should be setup
491 //; prior to any automatic mode switches. The following
492 //; code sets these registers up to a known state. Users will need to
493 //; customize these settings to meet their needs.
494 //;----------------------------------------------------------------------
496 MOV r1, #0xd7 //;ABT mode
497 msr cpsr_c, r1 //;ABT mode
498 msr spsr_cxfs, r2 //;clear the spsr
499 MOV r1, #0xdb //;UND mode
500 msr cpsr_c, r1 //;UND mode
501 msr spsr_cxfs, r2 //;clear the spsr
502 MOV r1, #0xd1 //;FIQ mode
503 msr cpsr_c, r1 //;FIQ mode
504 msr spsr_cxfs, r2 //;clear the spsr
505 MOV r1, #0xd2 //;IRQ mode
506 msr cpsr_c, r1 //;IRQ mode
507 msr spsr_cxfs, r2 //;clear the spsr
508 MOV r1, #0xd6 //;Monitor mode
509 msr cpsr_c, r1 //;Monitor mode
510 msr spsr_cxfs, r2 //;clear the spsr
511 MOV r1, #0xd3 //;SVC mode
512 msr cpsr_c, r1 //;SVC mode
513 msr spsr_cxfs, r2 //;clear the spsr
516 //;----------------------------------------------------------------------
517 //; Enabling Error reporting is something users may want to do at
518 //; some other point in time. We have chosen some default settings
519 //; that should be reviewed. Most of these registers come up in an
520 //; unpredictable state after reset.
521 //;----------------------------------------------------------------------
522 //;Start of error and control setting
524 //; setup L2CR0 with various L2/TCM control settings
525 //; enable out of order bus attributes and error reporting
526 //; this register comes up unpredictable after reset
528 .word 0xe3001f0f // hardcoded MOVW instruction due to lack of compiler support
530 .word 0xe34c1005 // hardcoded MOVW instruction due to lack of compiler support
531 MCR p15, 3, r1, c15, c0, 1 //; WCP15_L2CR0 r1
535 //; Enable I and D cache parity
536 //;L2CPUCR[7:5] = 3~Rh7 ~V enable parity error reporting for modified,
537 //;tag, and data parity errors
539 MCR p15, 3, r2, c15, c0, 2 //; WCP15_L2CPUCR r2
542 //; enable all error reporting (reset value is unpredicatble for most bits)
544 MCR p15, 0, r3, c9, c7, 0 //; WCP15_SPCR r3
546 //; setup DMACHCRs (reset value unpredictable)
547 //; control setting and enable all error reporting
550 //; DMACHCR0 = 0000000F
551 MOV r2, #0x00 //; channel 0
552 MCR p15, 0, r2, c11, c0, 0 //; WCP15_DMASELR r2
553 MCR p15, 0, r1, c11, c0, 2 //; WCP15_DMACHCR r1
555 //; DMACHCR1 = 0000000F
556 MOV r2, #0x01 //; channel 1
557 MCR p15, 0, r2, c11, c0, 0 //; WCP15_DMASELR r2
558 MCR p15, 0, r1, c11, c0, 2 //; WCP15_DMACHCR r1
560 //; DMACHCR2 = 0000000F
561 MOV r2, #0x02 //; channel 2
562 MCR p15, 0, r2, c11, c0, 0 //; WCP15_DMASELR r2
563 MCR p15, 0, r1, c11, c0, 2 //; WCP15_DMACHCR r1
565 //; DMACHCR3 = 0000000F
566 MOV r2, #0x03 //; channel 3
567 MCR p15, 0, r2, c11, c0, 0 //; WCP15_DMASELR r2
568 MCR p15, 0, r1, c11, c0, 2 //; WCP15_DMACHCR r1
570 //; Set ACTLR (reset unpredictable)
571 //; Set AVIVT control, error reporting, etc.
573 //; Enable I and D cache parity
574 //;ACTLR[2:0] = 3'h7 - enable parity error reporting from L2/I$/D$)
575 //;ACTLR[5:4] = 2'h3 - enable parity
576 //;ACTLR[19:18] =2'h3 - always generate and check parity(when MMU disabled).
577 //;Value to be written #0xC0037
579 .word 0xe3003037 // hardcoded MOVW instruction due to lack of compiler support
581 .word 0xe340300c // hardcoded MOVW instruction due to lack of compiler support
582 MCR p15, 0, r3, c1, c0, 1 //; WCP15_ACTLR r3
584 //;End of error and control setting
586 //;----------------------------------------------------------------------
587 //; Unlock ETM and read StickyPD to halt the ETM clocks from running.
588 //; This is required for power saving whether the ETM is used or not.
589 //;----------------------------------------------------------------------
591 //;Clear ETMOSLSR[LOCK] bit
593 MCR p14, 1, r1, c1, c0, 4 //; WCP14_ETMOSLAR r1
595 //;Clear ETMPDSR[STICKYPD] bit
596 MRC p14, 1, r2, c1, c5, 4 //; RCP14_ETMPDSR r2
599 #ifdef APPSBL_ETM_ENABLE
600 ;----------------------------------------------------------------------
601 ; Optionally Enable the ETM (Embedded Trace Macro) which is used for debug
602 ;----------------------------------------------------------------------
604 ; enable ETM clock if disabled
605 MRC p15, 7, r1, c15, c0, 5 ; RCP15_CPMR r1
606 ORR r1, r1, #0x00000008
607 MCR p15, 7, r1, c15, c0, 5 ; WCP15_CPMR r1
610 ; set trigger event to counter1 being zero
612 MCR p14, 1, r3, c0, c2, 0 ; WCP14_ETMTRIGGER r3
616 MCR p14, 1, r2, c0, c4, 0 ; WCP14_ETMSR r2
618 ; clear trace enable single address comparator usage
619 MCR p14, 1, r2, c0, c7, 0 ; WCP14_ETMTECR2 r2
621 ; set trace enable to always
623 MCR p14, 1, r2, c0, c8, 0 ; WCP14_ETMTEEVR r2
625 ; clear trace enable address range comparator usage and exclude nothing
627 MCR p14, 1, r2, c0, c9, 0 ; WCP14_ETMTECR1 r2
629 ; set view data to always
631 MCR p14, 1, r2, c0, c12, 0 ; WCP14_ETMVDEVR r2
633 ; clear view data single address comparator usage
635 MCR p14, 1, r2, c0, c13, 0 ; WCP14_ETMVDCR1 r2
637 ; clear view data address range comparator usage and exclude nothing
639 MCR p14, 1, r2, c0, c15, 0 ; WCP14_ETMVDCR3 r2
641 ; set counter1 to 194
643 MCR p14, 1, r2, c0, c0, 5 ; WCP14_ETMCNTRLDVR1 r2
645 ; set counter1 to never reload
647 MCR p14, 1, r2, c0, c8, 5 ; WCP14_ETMCNTRLDEVR1 r2
649 ; set counter1 to decrement every cycle
651 MCR p14, 1, r2, c0, c4, 5 ; WCP14_ETMCNTENR1 r2
653 ; Set trace synchronization frequency 1024 bytes
655 MCR p14, 1, r2, c0, c8, 7 ; WCP14_ETMSYNCFR r2
657 ; Program etm control register
658 ; - Set the CPU to ETM clock ratio to 1:1
659 ; - Set the ETM to perform data address tracing
661 MCR p14, 1, r2, c0, c0, 0 ; WCP14_ETMCR r2
663 #endif *//* APPSBL_ETM_ENABLE */
666 #ifdef APPSBL_VFP_ENABLE
667 ;----------------------------------------------------------------------
668 ; Perform the following operations if you intend to make use of
669 ; the VFP/Neon unit. Note that the FMXR instruction requires a CPU ID
670 ; indicating the VFP unit is present (i.e.Cortex-A8). .
671 ; Some tools will require full double precision floating point support
672 ; which will become available in Scorpion pass 2
673 ;----------------------------------------------------------------------
674 ; allow full access to CP 10 and 11 space for VFP/NEON use
675 MRC p15, 0, r1, c1, c0, 2 ; Read CP Access Control Register
676 ORR r1, r1, #0x00F00000 ; enable full access for p10,11
677 MCR p15, 0, r1, c1, c0, 2 ; Write CPACR
679 ;make sure the CPACR is complete before continuing
682 ; Enable VFP itself (certain OSes may want to dynamically set/clear
683 ; the enable bit based on the application being executed
686 #endif *//* APPSBL_VFP_ENABLE */